Grain yield optimisation in the Plain of Reeds in the context of climate variability

Abstract

The Plain of Reeds is a large floodplain in the Mekong Delta, where natural disasters such as droughts, off-season rainfall and floods have dramatically increased, leading to declining in crop yields. The objective of this study was to evaluate the adverse impacts of climate factors (ICF) on grain yield of the main growing crops in the Plain of Reeds to define the suitable cultivation period (SCP) for rice-growing areas as an adaptation solution to minimise the adverse impacts of climate factors. To conduct this research, a crop model was applied to define the suitable cultivation periods based on simulating the grain yields of each rice-growing season. When the suitable cultivation periods were deployed, the grain yield of all simulated growing crops improved significantly compared to the current cultivation periods (baseline), which, for the main growing crops in the Plain of Reeds, are no longer suitable for the current weather conditions that have been deeply affected by climate variability in recent years.

Potential risks of soil erosion in North-Central Vietnam using remote sensing and GIS

“…Soil loss due to erosion has serious environmental consequences (Abdo & Salloum, 2017;Vijith & Dodge, 2017) that are considered natural disasters (Allafta & Opp, 2022;Amellah & El-Morabiti, 2021). Soil erosion is accelerated by human activities, and the impacts of climate change have become a global problem (Brodie & Catherine, 2020;Dang, 2021). Studies on soil erosion for implementation of land use and management practices (LUMPs) are considered one of the key components needed to provide early warnings to minimise the damage to people and property caused by erosion (Mohamed et al, 2020).…”

Adapting to climate variability for rice cultivation paddies in the lowland coastal regions of Kien Giang Province, Vietnam

“…These challenges include saline intrusion and freshwater irrigation deficits (CGIAR Research Program on Climate Change, 2016; Abbas and Mayo, 2020). ICV is expected to accelerate the intensity and frequency of adverse environmental factors or "extreme environmental events, " and thus, many aspects of socioeconomic life and, especially, CCRs are threatened (IPCC, 2018;Dang, 2021). Studies on adaptation solutions to ICV have been conducted around the world (Abbas and Mayo, 2020;Bai and Xiao, 2020).…”

“…Results stated that farming experience is strongly linked to adaptation solutions to climate variability. In Vietnam, several studies on farmers' adaptability to ICV have been conducted in the central region of Vietnam by Shrestha et al (2016) and Thoai et al (2018), in the Red River Delta by Luu et al (2019), in the Plain of Reeds by Dang (2021), and in the Mekong Delta by Mishra and Pede (2017) and Lee and Dang (2018). Agricultural activities in CCRs are facing challenges, increasing the risk of a decline in crop yield and even crop failure (Thoai et al, 2018;Dang, 2021).…”

Potential risks of climate variability on rice cultivation regions in the Mekong Delta, Vietnam

“…Unlike other natural disasters, drought comes silently, but its consequences are extremely large (Miyan, 2015). In Vietnam, drought represents the most extreme natural threat to the socio-economic sector, and especially to agricultural production (Dang, 2021). For example, when the worst drought event in over 90 years hit Vietnam from 2014 to 2016, the government declared a drought emergency in 18 provinces in Vietnam, causing great losses to the agricultural sector (Lee & Dang, 2019).…”

“…For example, when the worst drought event in over 90 years hit Vietnam from 2014 to 2016, the government declared a drought emergency in 18 provinces in Vietnam, causing great losses to the agricultural sector (Lee & Dang, 2019). The emergence of severe droughts in the Mekong Delta has resulted in huge crop failures, with 90% of sowed fields perishing in the drought-impacted regions (RCSA, 2016;Dang, 2021). More recently, Vietnam recorded an extreme drought event in 2019 in 5 of 13 provinces in the Mekong Delta, and an emergency was declared.…”